Method of preserving blueberry with intermittent ozone processing

Abstract

The invention relates to the field of fruit and vegetable preservation, and specifically relates to a method of preserving blueberry with intermittent ozone processing. The method includes: performing precooling processing after harvesting blueberry, and putting the blueberry in refrigeration storage to perform intermittent ozone processing. The intermittent ozone processing includes performing ozone processing for 50-70 min for the first time by using the ozone gas with the concentration of 2-3 ppm, and performing ozone processing once by using the ozone gas with the same concentration every several days until the storage period finishes, wherein each processing time shortens several minutes based on the processing time of last time. Compared with low temperature storage, the healthy fruit rate of blueberry is greatly improved by using the method of the invention, and the quality of blueberry is improved. The method has no chemical agent residual, and meets the requirement of food safety.

Description

technical field [0001] The invention relates to the field of fresh-keeping of fruits and vegetables, in particular to a method for intermittent ozone treatment of fresh-keeping blueberries. Background technique [0002] Blueberry is one of the emerging small berries in China in recent years. Blueberry fruit is suitable for sweet and sour, with unique flavor and rich nutrition. It has health care functions such as preventing brain aging, anti-cancer, enhancing body immunity and improving eyesight. one. Blueberry fruits generally ripen in summer, when the field heat and respiratory heat are high, the respiration of postharvest fruits is enhanced, and various physiological metabolisms are accelerated, resulting in blueberry fruits that are not resistant to storage, and the storage period at 20°C is only about 1 week. The postharvest quality decline of blueberries is mainly manifested in the loss of water, the decrease of hardness, the softening of the pulp, and the pedicle sc...

AI Technical Summary

Problems solved by technology

Low temperature preservation can extend the storage period of blueberries to a certain extent, but to achieve longer storage and transportation must be supplemented by other means

②Modified atmosphere preservation: Zheng Yonghua [2] The study found that high concentrations of O 2 Can significantly inhibit the respiration rate and ethylene release rate of blueberry fruit, delaying fruit senescence; Schotsmans et al. [3] Using 2.5kPa O 2 +15kPa CO 2 The controlled atmosphere conditions can prolong the storage life of rabbit eye blueberries for more than two weeks, but these are artificial controlled atmosphere preservation methods, and a certain proportion of gas needs to be filled in the storage process, resulting in higher costs

③ Chemical preservation: Wang et al. [4] Using allyl isothiocyanate (AITC) to carry out experiments on blueberries, the results show that AITC treatment at 10°C can effectively delay the rot of blueberry fruits, but the storage and preservation of chemical agents can easily cause toxic residues and endanger human health. facing severe challenges

At present, it is necessary to select the appropriate ozone sterilizing concentration, sterilizing times and sterilizing time for blueberries according to the variety characteristics of blueberries. There is no research report on this intermittent ozone treatment method and means.

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